<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
  <script>
    {
      let a = 10;
      var b = 5;
    }
    //console.log(a);
    console.log(b);

	const PI = 3.1415;
	//PI = 3;
  </script>
</body>
</html>
